Musschenbroek, Petrus van - Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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4733DE MAGNETE.11
# Lin. # gran.
# 6 # 131
# 4 # 172
# 0 # 340
22
# Lin. # gran. # repulſion.
# 6 # 25 {1/2} # 156 {1/2}
# 4 # 29 # 201
# 0 # 44 # 384

Attendens autem ad numeros, ſummam repulſionis exprimentes,
inter eos & diſtantias conſtantem proportionem non animadvertere
potui, ſed ſi quædam obtineat, non erit alta, & minor quam ſim-
plex inverſa diſtantiarum, incipiendo ſupputationem a contactu ipſo:
nam 6. 4: : 201. 134. loco 156 {1/2}. tum 7. 6: : 156 {1/2}. 134 {1/7}. loco 139.
tum 10. 7: : 139. 97 {3/10} loco 111. tum 12. 10: : 111. 92 {3/4}. loco 94 {1/2}.
Attamen non dubito, quin conſtans proportio obtineat inter diſtan-
tias & repulſiones, modo hæ ſolæ, ſeparatæque ab omni alia cauſa
haberentur, imo attractiones ſolæ etiam in conſtanti ratione eſſe poſ-
ſunt, ſed turbantur forſitan a repulſionibus: nam uterque polus Mag-
netis vim repellentem æque oſtendit, ac attrahentem: & idcir-
co ex eodem polo vis attrahens & repellens exibit: quando poli Mag-
netum duorum ſibi amici obvertuntur, attractio præpollet repulſio-
ni; quando inimici ſe reſpiciunt poli, repulſio ſuperat attractionem;
quare ſemper actio datur compoſita ex attractione & repulſione: un-
de proportiones duæ componentes actionem in Experimentis obſerva-
tam, forent ex quantitatibus notatis extricandæ a ſe invicem, ut
ſolæ haberentur, quod difficillimum erit; nec prius veram propor-
tionem attractionis & repulſionis determinare poterimus. In hac
itaque rerum caligine, præſtabit ſuspendiſſe adhuc judicium, & can-
dide memoraſſe obſervationes, ex quibus ſerior ſapientiorque ætas
multa forte eruet, poſtquam plura data hoc in negotio acceperit:
Neque noſtrum ſilentium dedecori erit, cum ſapientiſſimi Philoſophi
Florentini de Magnete agentes, etiam Experimenta tantummodo at-
tulerint, nihil ratiocinii addentes, neque ullas ex iis elicientes ſeque-
las, ne ficta pro veris, ſive hypotheſin loco demonſtrationis darent,
carbonemque pro theſauro relinquerent.

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